Convertible motor and pump.



E. R. SLOAN. CONVERTIBLE MOTOR AND PUMP.

\ APPLICATION rum) nuns, 1913. 1,085,761 I A Patented Feb. 3, 1914.

U3 4 SHBETSSHEET 1.

i .;'i: WI ZVESSES INVENTOR A Home E. R. SLOAN. CONVERTIBLE MOTOR ANDPUMP.

APPLICATION FILED J'AN.13, I913. 1,085,761 Patented Feb. 3, 1914.

4' SHEETE-SHEET 2.

[1V VEN T OR WLZ?ESSES z. 7

5' MM Y? O M Attorney E. R. SLOA N.

CONVERTIBLE MOTOR AN-D PUMP.

APPLICATION FILED JAN.13, 1913.

1,085,761 Patented Feb. 3, 1914.

4 SHEETS-SHEET s. 5 o

l 2% E 1 Ln Q:

i Q Q l I\ i N G Q l; E 1 I N (:1

m Q Q I l I WITNESSES a L VVENTOR E. R. SLOAN;

CONVERTIBLE MOTOR AND PUMP.

APPLICATION FILED .TAN.13, 1913,

1,085,761. Patented Feb. 3, 1914.

4 SHEETSSHEET 4.

3% Q m M X1 Go a b 9 a? X G m I U] 22%! I I Y L0 .5 1 If 5 1 a: E A

*5 I W k WITNESSES Allorney to the engine shaft.

other fluid is employed,

EDWARD RAYMOND SLOAN, 0,1 DETROIT, MICHIGAN.

CONVERTIBLE MDTOR AND PUMP.

Specification of Letters Patent.

Patented Feb. 3,1914.

Application filed January 13, 1918,. Serial K0. 741,207.

To all wkom it may concern;

Be it known that I, EDWARD RAYMOND SLoAN,-a citizen of the UnitedStates, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements inConvertible Motors and Pumps, of which the following is a specification.

This invention is an apparatus particularly designed for use as astarter for gas engines used on motor vehicles, but is not limitedthereto and is capable of other uses to which it may be applied.

The device embodies a convertible pump and motor which is operativelyconnected Compressed air or and when the d vice is used for startingpurposes it acts as a motor and is operated by compressed air to turntheengine shaft. When convert ed into a pump or compressor, it is operatedby the engine shaft, and acts to pump up pressure as desired, in thetank or reservoir. The conversion of the device from a motor to a pumpor vice versa is efi'ected by means of a suitable valve controlling aplurality of passages.

An embodiment of the invention is illustrated in the accompanyingdrawing-in which- Figure l is a plan view of the running gear of a motorvehicle, showing the arrangement of the device as applied thereto. Fig.2 is an elevation, partly in section, of the rear side of the motor orpump. Fig. 3' is an elevation of the device showing the in.- teriorparts, the back plate and other par-ts being removed. Fig. 4 is a sideelevation.

Fig. 5 is a vertical cross section on the line 5-5 of Fig. 4. Fig. 6 isa. vertical longitudinal section on the line 6-6 of Fig. 2. Referringspecifically to the drawings, Fig. 1 shows the running gear of a motorvehicle on which is mounted in any suitable manner an air reservoir 50connected by a pipe line 25, provided with a cut off valve 52, tothemotor or compressor to be hereinafter described. 54 is a lever bymeans of which the operation of the starter is controlled. It ismechanically connected by suitable links and levers to an arm 24* on arotary controlling valve. The illustration of the above parts will beaccepted as since the location and arrangement of the parts may bevaried as desired.

is made in four sections,-

largely diagrammatic,

The starter mechanism is inclosed in a caslngor box 55 with a back plate22 suitably mountedon the front end of the vehicle frame, as by crossrods 56 extending through perforat lugs 57 on the back plate. This boxis located at the front end of the engine shaft 5.8 which projects intosaid casing and is bolted at its front end, as indicated at 59, to acircular somewhat similar plate B is located at the opposite side, and arim or cylinder F is bolted or held, as by bolts 6, between these platesE and B. The cylinder or wall F as shown particuwith slots between thepistons 0r blades 27 which Work radially in said slots. The casingformed by the walls E and B and the rim F is circular, and isconcentrically disposed with respect to the axis of the shaft 58, and itrevolves with said shaft inside the outer casing 55. The pistons 27 arepressed at their outer ends by springs H against the periphery of afixed inner eccentric drum 50, which is sages to be hereinafterdescribed.

The drum 60 is fastened to the. back plate 22 by bolts 61 so that it isrelatively immovable. At one point, the top, as shown, the periphery ofthe drum 60 is in contact with e inner surface of the rim F. The airpipe 25, from the tank 50, opens into a channel 14 formed on the backplate 22 and this ommunicates with a segmental channel or passage 13 onone side of a circular disk valve plate 2-1 which-has a hollow hub eX-tending through the back plate, around the shaft 58., and connected tothe opcratin arm 24, whereby the valve may be turne The valve plate hasa part 26 whereby the passage 13 may be o. ened to either of thepassages 32 or 7 in t e drum 60. The passage 32 extends to an outlet oropening 32 on one side of the point of contact between the drum and thecasing F, and is used as an inlet when the device is operating as amotor. Then air pressure will flow from the pipe25 through the passage14, port 26, and passage 32 into the space between the drum and casingF, and by pressure against the blade or piston 27 will turn the casing Fand thereby turn the engine shaft. The drum is also provided with apassage 33 which opens through an exhaust port 33 in the back plate 22,and when operating larly in Figs- 3 and 5,, the sections for p as amotor the air pressure exhaustsplate E. A'

provided with paslid ' letting out a portion of the air until after asucceeding piston has reacheda position where it will receive thepressure entering through the passage 32. To let out any compression onthe opposite side of the device, while it is acting as a motor asdescribed, the drum has a passage 31 which terminates at a port 5 at theback of the drum, and said port is controlled by an opening 36 in thedisk valve 21, said port 36 connecting the port 5 with an outlet orrelief port 5 extending through the back plate '22. Hence when the valveis set as shown in Fig. 3 the device will act as a motor, air pressureentering through the port 32 on one side of the chamber, and anycompression on the other side of the chamber escaping through thepassage 31, ports 5, 36 and 5 To act as a compressor orfipump, the valve21 is turned until the opening 36 laps a port 4: communicating through apassage 45 with the space on the left side of the chamber, and with aport 4 opening through the back plate 22. The same action closes theport 5, and also shifts the opening 26 from the passage 32 to a port 7at the end of a passage 7 a which communicates through a check valve 30with the right or compressor side of the chamber between the drum andthe casing F, and the passage 32 is thereby cut 0E or closed. A breatherpassage 40 is also formed in the compressor side of the drum andcommunicates through a port 40 with an opening or port 40 in the backplate 22 for the purpose of letting in or letting out the air from thecompression chamber. When the device is-acting as a motor the breatherport l0 has no function except as an auxiliary exhaust port. When thedevice is acting as a compressor the breather port 40 performs thefunction of athered into the casing, before compression fiegins, inorder to avoid too great compression. The breather passage is elongatedso that the volume of air to be compressed can be varied by changing thelocation of the hole 40. Compression does not begin until the blade 27passes the opening 40. Until that time, the air escapes through saidopening. Consequently by varying the position of the opening 40 alongthe elongated passage the amount of air compressed is varied. Theopening etO is shown at or about the middle of the passage. If it werelocated at the upper end the amount of compression would be decreased;if at the lower end, the amount of compression would be increased, bylater or earlier cutting off of the openings respectively by the blades27. The hole 40 can be motor,

bored at any position along the passage. By thus shifting the valve thepassage 7* is thus connected through the ports 7 and 26 with thepassages 13 and 14: and the air pipe 25, and when the outer cylinder isrotated by its connection to the crank shaft air is compressed on theright hand side of the drum,

as shownin Figs. 3 and 5, and is forced through the valve 30 and thepassages to the air pipe and reservoir where it is stored. Vacuum in thechambers behind the pistons 27 -is prevented by air entering freelythrough ports 33 and 4t. To prevent excessive pressure, the channel itis provided with an opening to a plunger 80, in a casing 81 attached tothe back plate 22. This plunger ispressed closed by a spring 82, j

and has a rod 83 connected to one end of a lever 84, the other end ofwhich presses on a rod 85 connected to a relief valve 86 whichcommunicates with a port 15 which opens from the passage 31. When thepressure exceeds the strength of the spring 82 it lifts the plungerwhich through the lever 8% opens the 'valve 86,'and then any pressurecreated in the chamber by the rotation of the cylinderescapes throughthe passage 31,

port 15 and valve 86, the check valve 30 elos- 4 ing; and the pump thusruns idle. When it is again necessary to use the starter as a the valve21 is turned to original position and pressure is admitted to the leftside of the chamber and drives the cylinder and shaft as abovedescribed.

What I claim is: p

1. In a convertible rotary motor and pump, the combination of a shaft, afixed eccentric drum provided with inlet and outlet passages, andexhaust passages, a rotary cylinder attached to the-shaft and rotatablearound said drum and in contact with the periphery thereof at one point,pistons carried by said cylinder and workin in the chamber between thedrum and cy inder, a pressure reservoir, a pipe connection thereto, anda valve controlling all of said passages and located between. said drumand pipe and adapted to open either of said outlet and inlet passagesand close the other.

2. In a convertible rotary motor and pump, the combination of a shaft, acylinder fixed thereon, pistons carried by the cylinder, a fixedeccentric drum extending around the shaft and in contact at one pointwith the inner surface of the cylinder, springs tending to hold saidpistons in contact with the drum, an air reservoir and a pipe con-vnected thereto, said'drum having a pressure inlet passage openingintothe chamber between the cylinder and drum on one side of said point,and a pressure outlet passage opening from said chamber on the oppositeside of the said point, suitable exhaust and air inlet passages in saiddrum, and a valve between said pressure inlet and outlet pas- .with atone cylinder in yielding contact with the pesages and the said pipe,adapted to open either one and close the other of saidpasriphery of thedrum, said drum having on one s1de an inlet pressure passage, an exhaustpassage and a relief passage, and havmg on the opposite side an outletpressure passage, an air inlet passage and a relief passage, all of saidpassages communicating with the space between the cylinder and drum, areservoir, a pipe connected to the reservoir, and a valve locatedbetween said drum and pipe and having a port controlling said inlet andoutlet pressure passages to the pipe, and also having a port controllingsaid relief passages.

4. The combination with a convertible rotary motor and pump, providedwith a valved relief port, of a reservoir, a pipe connecting said motorand pump and reservoir, a valve controlling flow from the motor and pumpto the reservoir and vice versa, and

means actuated by the pressure in the pipe to operate the valve of therelief-port.

5. In a convertible motor and pmnp, the combination of a shaft, acylinderrotating therewith, an eccentric fixed drum within 7 thecylinderand in contact therewith at one point, said drum having an inletpressure passage-32, an exhaust passage 33 and a relief passage 4 in oneside thereof and also having the outlet pressure passage 7, the

breather passage and the relief passage 31 on the opposite side thereof,said passages 32, 4, 7 and 31 terminating in ports located around theshaft, the disk valve 21 extending around the shaft arid having a port26 cooperating with said passages 32 and 7 and another port 36cooperating with said. passages 4 and 31, a gas reservoir, and a pipeconnected at one end thereto and terminating at the opposite end in apassage 13 leading to said port 36.

In testlmony whereof, aflix my signature in presence of two witnesses.

EDWARD RAYMOND SLOAN. Witnesses:

HENRY E. Anmsrnncnn,

WILLIAM GUAN.

